The Spaniard has shown signs of his usual dominance since switching to grass this week and he continued his Wimbledon preparations with a 7-6 (7-3) 6-3 victory over Troicki in Germany.
A worrying slump of form has seen Nadal slip to No 10 in the world rankings and his dominant reign at the French Open was ended by a quarter-final defeat by Novak Djokovic at Roland Garros.
But he will have drawn plenty of confidence from securing only his second ATP title this year, with Troicki unable to put a dent in the top seed???s serve.
Troicki himself had yielded just three points on his own service games in the first set, but was edged out in the tie-breaker as Nadal took a 1-0 lead with a searing ace.
Into the second set, Nadal tightened his grip on the match when Troicki gifted a break with an over-hit forehand.
This breakthrough was all that Nadal needed and he claimed the trophy for a third time after a fierce overhead smash.